I take my backpack on all my trips. It carries things like a bag full of breakfast/granola bars, some of those single size packets of lemonaid and gatoraid mix, and some bottles of water for the food and water.
Another small bag inside with matches and lighters, etc.
A small first aid kit.
A few small tools, leatherman squirts and the wave bit adapter and bits,
buck 110 knife, compass, binoculers.
AA battery charger (maha c401fs) and a few packs of aa batteries for the camera and such.
change of clothes should I need to get dirty changing a tire.
Pill bottle of quarters, old wallet with some cash.